EP0763437B1 - Dispositif de surveillance de pneumatiques et récepteur à plusieures voies - Google Patents

Dispositif de surveillance de pneumatiques et récepteur à plusieures voies Download PDF

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Publication number
EP0763437B1
EP0763437B1 EP96114843A EP96114843A EP0763437B1 EP 0763437 B1 EP0763437 B1 EP 0763437B1 EP 96114843 A EP96114843 A EP 96114843A EP 96114843 A EP96114843 A EP 96114843A EP 0763437 B1 EP0763437 B1 EP 0763437B1
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EP
European Patent Office
Prior art keywords
wheel
receiving antenna
receiver
switches
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP96114843A
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German (de)
English (en)
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EP0763437A1 (fr
Inventor
Michael Schröttle
Willi Schmidiger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ALPHA-BETA ELECTRONICS AG
Alpha Beta Electronics AG
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ALPHA-BETA ELECTRONICS AG
Alpha Beta Electronics AG
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Publication of EP0763437A1 publication Critical patent/EP0763437A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B60C23/0415—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels
    • B60C23/0416—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
    • B60C23/0433—Radio signals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
    • B60C23/0433—Radio signals
    • B60C23/0435—Vehicle body mounted circuits, e.g. transceiver or antenna fixed to central console, door, roof, mirror or fender
    • B60C23/0444—Antenna structures, control or arrangements thereof, e.g. for directional antennas, diversity antenna, antenna multiplexing or antennas integrated in fenders

Definitions

  • the present invention relates to a tire pressure monitoring device according to the preamble of claim 1. Furthermore, the Invention a multiple receiver (multi-path receiver or diversity Receiver), in particular a quadruple or quintuple receiver for such a tire pressure monitoring device.
  • the invention Tire pressure monitoring device can be and aircraft that are equipped with multiple pneumatic tires are.
  • the tire pressure monitoring device according to the invention is preferably used to monitor the pressure in the tires of motor vehicles such as cars, trucks and buses. Without being limited to that to be, the tire pressure monitoring device according to the invention described below in connection with a car that is equipped with four monitored wheels. Optionally, additional the air pressure in the spare wheel can also be monitored.
  • a tire pressure monitoring device of this type is from the document DE-A1-28 50 787 known (see FR-A1-2441 502 of the same alarm for the same subject).
  • the alarm device described there to monitor the pressure in automotive tires assigns each wheel a pressure sensor provided with a deflectable membrane.
  • a Membrane deflection can occur if the value falls below or is exceeded Tire target pressure occur and interrupts the transmission of an RF signal.
  • the monitored air pressure is within specified limits is intermittently one of two bits transmit existing signal telemetrically to receiving antennas that are arranged close to the tires on the vehicle body, so that there is a close coupling of the antenna to the assigned transmission device on the wheel. This coupling improves the reception quality and facilitates identification.
  • these Receiving antennas are located near the fenders for the wheels his.
  • the signals to be transmitted can be encoded to the identify the respective broadcaster and provide additional information transfer.
  • a central evaluation device can be provided at a distance from these antennas be, which evaluates the radio telegrams and warning or Alarm signals generated for the driver.
  • Hit help of an analog switch (cf. the circuit diagrams according to FIGS. 15 and 15A) can different antenna outputs are sampled individually, the Selection by the states of a binary counter in connection with a internal decoder can be selected.
  • a clock generator is assigned to both. The input signals processed by multiplexing occur the evaluation device and are processed there.
  • this coupling alone has often proven to be insufficient proven.
  • the transmitter is on the spinning wheel, often shielded by rim and jacket of the pneumatic tire.
  • the wheel rotation can cause insufficient reception conditions, for example can be caused by extinctions and / or reflections at the location of the receiving antenna Signal cancellations occur.
  • It also requires a safe Signal transmission of useful signals often has such a high signal strength, that the radio telegram generated by a transmitter is not only from the immediately adjacent and assigned receiving antenna but also from the other receiving antennas on Vehicle.
  • the receiving antennas can be used on a vehicle also the radio telegrams from the neighboring, received another vehicle.
  • document US-A-4,376,931 discloses a system for detecting pressure deviations in pneumatic tires, with each wheel being associated with an antenna of the vehicle-side RF transceiver which is arranged adjacent to the wheel arch.
  • This antenna transmits at the natural frequency of a crystal resonator of the wheel-side RF transceiver.
  • the church resonator resonates and transmits a resonance frequency to the spatially assigned antenna, which forwards the received signal to the receiver of the vehicle-side RF transceiver.
  • the absence or occurrence of the resonator frequency serves as an indication of a pressure deviation.
  • the vehicle-side RF transceiver can query the number of wheel-side RF transceivers one after the other.
  • each wheel-side RF transceiver can have a crystal resonator with a different natural frequency.
  • This known tire pressure display device typically operates at a natural frequency of the crystal resonators of 4 MHz.
  • Document US-A-5,289,160 describes a comparable tire pressure monitoring system, in which the signal transmission between the vehicle-side RF transceiver and the wheel-side RF transceiver with high frequency (HF) in the range of 900 up to 945 MHz.
  • the carrier frequency can be done with a binary code be modulated by a separate identifier (identifying code) for each provides RF transmitter / receiver device on the wheel side.
  • identifying code a separate identifier
  • the assignment of a received radio telegram to the "sending wheel” can use this identifier respectively.
  • Zeilfen 58 fff can the vehicle-side RF transceiver one or two wheel-side RF transceiver (s) query in time-division multiplexing.
  • Document WO 93/16891 discloses a control device for the Air pressure of pneumatic vehicle wheels.
  • the signal transmission takes place telemetrically from each rotating wheel, for example central receiving device.
  • the radio telegrams are with one for the each wheel characteristic identification signal.
  • the Receiving device is provided with a memory in which these identification signals Are stored in relation to the wheel. With the intended Operation is assigned to a received on the vehicle Radio telegram to the sending wheel about the identity of a telemetric transmitted and received identification signal with the stored Identification signal for the associated wheel.
  • the vehicle-side Receiving device processes received signals only if that received identification signal with a received signal in the vehicle side stored identification comparison signal matches.
  • the identification comparison signal Before commissioning this known tire pressure monitoring device the identification comparison signal must be in the vehicle-side receiver generated and saved. For this, a "Pairing mode" suggested that only when the vehicle is stationary is carried out. During the pairing mode sends a specific one the associated identification signal on the wheel-side transmitter, and the decoding devices of the vehicle-side receiving parts bwz. check a microprocessor in the central evaluation device for each of the four receiving parts the intensity of the received signal.
  • Every signal emitted by a transmitter of a wheel becomes one Assigned receiving part, in which it has the highest signal intensity generated.
  • the selected receiving section is assigned with the highest signal strength and the associated input (VL, VR, HL, HR) on the central device via targeted plug connections. Since the vehicle is stationary during this pairing mode, the disturbances are very small and therefore the corresponding assignment easily possible.
  • the unpublished document EP-B1-0 828 621 which is a priority of May 26, 1995 concerns an establishment Vehicles for monitoring the air pressure in their tires.
  • Each too Monitoring wheel is provided with a pressure sensor, which a transmitter is arranged which emits signals which from the pressure sensor determined air pressure include.
  • On the chassis of the vehicle there are several antennas for the reception of these signals, whereby only an antenna attached to the associated wheel is.
  • Each antenna is connected to a common one via a connecting line electronic reception and evaluation circuit connected.
  • pressure sensor and sensor typically work not permanent, but to protect those who operate them Battery activated only at intervals and then send a data telegram to the recipient. Because the transmitter provided on the wheels are not synchronized to each other, it is possible that data telegrams of different wheels overlap each other. To still be one It is planned to be able to carry out clear tire pressure monitoring for each signal that is sent to the receiver, one Field strength evaluation. For this purpose leads from the Connection lines each a branch line bypassing the Receiver to the microcomputer. In each of these branches a rectifier and a limit switch in series. The rectifier causes rectification of the branched signal component. If the field strength of the signal is sufficient, the rectified component can pass the limit switch and reaches an input of the Microcomputer, which is then set HIGH. That way the microcomputer receives the signal transmitted to it by the receiver assign to specific wheel.
  • the receiver can be used for each Wheel preceded by a switch controllable by the microcomputer.
  • the Signals coming from the antennas are switched to Receiver switched through with demodulator.
  • the field strength evaluation is done in the same way. Only when one of one of the connecting lines branched and rectified signal one of the inputs of the Microcomputers has set HIGH, that in the associated connecting line horizontal switch closed and that of the antenna incoming signal switched through to the receiver. Another, in time overlapping incoming signal from another antenna is from the Microcomputer is not switched through to the receiver and interferes with the Evaluation of the first signal not received.
  • the aim of the invention is, in the telemetric transmission of radio telegrams, that of RF transmitters on several stationary or rotating wheels of a vehicle and from a evaluated central, stationary evaluation device arranged on the vehicle the selection and identification of the currently "sending" To improve the wheel. Furthermore, the security during the transmission of useful signals of such RF radio telegrams can be increased.
  • This task is performed by a tire pressure monitoring device with all of the features of claim 1 or claim 2 solved.
  • One multiple receiver each for such a tire pressure monitoring device is by the features of claim 3 or claim 4 marked.
  • the present invention is primarily concerned with with the receiving devices on the vehicle.
  • transmitter-side components on the wheel such as a signal generating device, Transmitter and the like become known Components used.
  • These transmitter-side components can be on a tire valve, for example, like that in documents DE-C2-39 30 479 or DE-C2-43 03 583 is described.
  • Can continue the transmitter-side components are located on a valve cap, on the valve tube of a conventional tire valve a vehicle tire can be screwed on like that in the documents DE-C2-39 30 480 or DE-C2-43 03 591 described is.
  • these transmitter-side components also attached to the rim of a vehicle wheel be as described in other publications.
  • a radio telegram in the form of an RF signal generate that contains at least one synchronization signal and at least useful signals, which the most important current state variables of the pneumatic tire specify, in particular the tire pressure and if necessary the tire temperature.
  • the radio telegram is typically a modulated RF signal in the megahertz range (MHz), for example frequencies above 200 MHz, preferably frequencies around 433 MHz or around 900 MHz can be provided.
  • the data to be transmitted are preferably digital Form before, and it can be an amplitude modulation or a Frequency modulation of the carrier frequency can be provided.
  • a preferred radio telegram available in digital form can be about 60 to 80 bits.
  • Such a radio telegram contains a synchronization signal (about 8 to 16 bits) and the useful signals (approximately 4 to 16 bits) and may additionally have an identifier (typically 32 bits) and a check digit.
  • takes the transmission of such a radio telegram a few microseconds to a few milliseconds.
  • At a preferably used transmission device takes the transmission a radio telegram comprising approximately 80 bits 5 msec.
  • Each wheel with its transmitter is a receiving antenna assigned.
  • This receiving antenna is adjacent to the Wheel fixed to the vehicle, for example in the area of the respective wheel arch.
  • This receiving antenna is in a known manner for receiving RF signals from the wheel electronics to optimize. Demodulation and decoding these signals take place in the receiver and the evaluation device.
  • the receiver can preferably be used for sensitivity from minus 100 to minus 120 dBm.
  • a reception and evaluation device is located in the center of the vehicle housed.
  • This receiving and evaluation device can be combined into a single unit be and then includes the actual recipient, as well as one Evaluation device in the form of a control unit or microprocessor with the various switching devices (decoding) and logic elements. About these switching devices also includes a multiplexer circuit.
  • This unit can for example in the trunk of a vehicle his. Lines from this unit can then be used for signal transmission to the dashboard or to the interface of a Run the vehicle's on-board computer.
  • a single receiver can be provided, the over lines with a spatially separate evaluation device connected is.
  • each receiving antenna is only one for all receiving antennas Assigned recipient. From each receiving antenna (below "Antenna" for short) each has its own connection line the recipient. Depending on the arrangement of the central unit with these connecting lines can be different for the receiver Have length, resulting in a corresponding different attenuation of the connecting cable transmitted signals. In such a case the measured field strengths are additionally assessed (Microprocessor) to such device-related damping compensate. It is typically within the scope of the invention not required on the way from the antenna to the receiver to provide an amplifier.
  • a switch is inserted in each connecting line.
  • Each switch is from the multiplexer circuit controlled in time-division multiplexing and such put in a blocking state or in an on state.
  • a multiplexer circuit particularly suitable for the present invention typically includes a microprocessor, in order to control these switches in a suitable manner - in contrast to known multiplexer circuits per unit time typically only a single switch in the Relocate pass state is within the scope of the present According to the invention, such a multiplexer circuit is preferably provided, the multiple switches or all switches at the same time can put in the pass state.
  • each to sense field strength applied to an antenna and to register the antenna with the greatest field strength to select there are basically different options, each to sense field strength applied to an antenna and to register the antenna with the greatest field strength to select. For example, any antenna can do this sequentially queried in time-division multiplexing are determined and the respective field strength determined, saved and be matched to one another Determine antenna at which the greatest field strength is present.
  • the invention is not limited to any one here Procedure for determining the antenna with the greatest field strength limited.
  • two different options are provided for to select that antenna at the given time the greatest field strength during the transmission of a radio telegram is present.
  • the radio telegram is assigned to a specific one on the basis of the antenna selected in this way Assigned wheel that is adjacent to the selected antenna located.
  • the radio telegram is assigned to a specific one on the basis of the antenna selected in this way Assigned wheel that is adjacent to the selected antenna located.
  • the receiver can with every bit period approach the maximum received signal without losing a data bit, since the reception conditions get better with every selection. Is the strongest Once the antenna is determined, the resulting wheel assignment can be made continue to be verified and corrected by last bit of a radio telegram For this further verification can also do that for each bike and its transmitter characteristic identifier signal with which each Radio telegram is preferably additionally equipped.
  • the probability of misinterpretation thus decreases Bit to bit within a radio telegram and from one Radio telegram to the next radio telegram.
  • So is a small number of components and high with a minimum number of radio telegrams Accuracy when assigning a radio telegram the "sending wheel" achieved.
  • the method for selecting the antenna explained above with the greatest field strength can be during the entire Duration of a radio telegram. Preferably however, this selection will only be made during the duration performed the synchronization signal of a radio telegram.
  • a synchronization signal can for example 8 to 16 bits.
  • This synchronization signal still contains no data information regarding the useful signals. Even if some bits of the sync signal are in the process of the selection process can be lost Wheel assignment can be made. In this case can decode and evaluate the useful signals after the assignment of the radio telegram to certain wheel is fixed.
  • the multiplexer circuit at a given time only one during the receipt of a radio telegram single switch or only two switches in the on state transferred and at a later time during the Receiving the same radio telegram several at the same time Switch or all switches in the on state.
  • the multiplexer circuit during transmission of a synchronizing signal of a radio telegram successively puts only one switch or only two switches into the pass state until the antenna with the greatest field strength is selected; and the multiplexer circuit puts several switches or all switches into the on state during the subsequent transmission of the useful signal of this radio telegram in order to achieve multiple reception of this useful signal via several antennas.
  • A also serves to further explain the invention Circuit diagram with which the structure of a multi-receiver preferred according to the invention is.
  • a receiving and evaluation device preferred according to the invention can have a structure, for example, as in shown in the single circuit diagram.
  • a car with four active wheels is four Receiving antennas A, B, C, N are provided. From each antenna A, B, C, N each lead a connecting line a, b, c, n to one Summing point S.
  • each connecting line is a, b, c, n a diode acting as a switch or one acting as a switch Transistor used.
  • the receiving and evaluation device is equipped with a microcontroller that in turn equipped with an input multiplexer circuit is.
  • One control line a ', b' leads from the microcontroller, c ', n' to the assigned connecting line a, b, c, n, um to control the respective switch and either in the Disable state or in the on state. Consequently the microcontroller can register which antenna too switched to the summing point at a given point in time is.
  • the summing point is through a filter with the receiver connected. With the help of the receiver, not only is the radio telegram demodulated, but it also becomes the field strength recorded at a certain point in time at the summing point is present.
  • the field strength initially determined in analog form is converted into an with the help of an analog / digital converter digital field strength signal converted and the microcontroller fed for evaluation. Furthermore, according to Demodulation of the useful signals via a data signal line fed to the microcontroller and evaluated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measuring Fluid Pressure (AREA)

Claims (12)

  1. Dispositif de surveillance de pression des pneus pour un véhicule avec plusieurs roues, qui sont équipées chacune d'un bandage pneumatique comprenant
    un dispositif de génération de signaux sur chaque roue, qui détecte la pression de pneu et éventuellement la température du pneu et émet des signaux de pression respectivement des signaux de température électriques correspondants ;
    un dispositif émetteur sur chaque roue qui génère un radiotélégramme qui comprend au moins un signal de synchronisation et au moins des signaux utiles en fonction du signal électrique de pression et éventuellement du signal de température et les transmet télémétriquement aux antennes de réception ;
    une antenne de réception (A, B, C,...N) par roue qui est fixée solidaire au véhicule à proximité de la roue considérée ;
    un dispositif central fixé solidaire au véhicule pour l'analyse des radiotélégrammes pour fournir au conducteur du véhicule des informations sur l'état des différents bandages pneumatiques ;
    un récepteur intégré ou relié au dispositif central d'analyse qui est relié à chaque antenne (A, B, C,... N) par une ligne de liaison (a, b, c, ..n) dans laquelle est placée un interrupteur ;
    un circuit multiplexeur intégré dans le dispositif d'analyse ou associé au récepteur qui active ces interrupteurs dans le procédé de multiplexage par répartition dans le temps ;
    caractérisé en ce que
    par l'analyse des intensités de champ saisies par le récepteur il s'effectue une sélection de l'antenne avec la plus forte intensité de champ, le circuit multiplexeur
    transposant plusieurs ou tous les interrupteurs à l'état passant avant l'arrivée d'un radiotélégramme ;
    transposant un interrupteur à l'état de verrouillage après l'arrivée d'un radiotélégramme et pendant l'analyse du signal de synchronisation en continu jusqu'à ce que l'antenne avec la plus grande intensité de champ soit déterminée ; et
    transposant ensuite pendant la réception du signal utile de ce radiotélégramme plusieurs interrupteurs ou tous les interrupteurs à l'état passant pour obtenir ainsi une réception multiple de ce signal utile par plusieurs antennes (A, B, C, ... N), et
    en ce que le dispositif d'analyse associe à l'aide de cette antenne sélectionnée le radiotélégramme à une roue définie qui se trouve à proximité de l'antenne sélectionnée.
  2. Dispositif de surveillance de pression des pneus pour un véhicule avec plusieurs roues, qui sont équipées chacune d'un bandage pneumatique comprenant
    un dispositif de génération de signaux sur chaque roue, qui détecte la pression de pneu et éventuellement la température du pneu et émet des signaux de pression respectivement des signaux électriques de température correspondants ;
    un dispositif émetteur sur chaque roue qui génère un radiotélégramme qui comprend au moins un signal de synchronisation et au moins des signaux utiles en fonction du signal électrique de pression et éventuellement du signal de température et les transmet télémétriquement aux antennes de réception ;
    une antenne de réception (A, B, C,...N) par roue qui est fixée solidaire au véhicule à proximité de la roue considérée ;
    un dispositif central fixé solidaire au véhicule pour l'analyse des radiotélégrammes pour fournir au conducteur du véhicule des informations sur l'état des différents bandages pneumatiques ;
    un récepteur intégré ou relié au dispositif central d'analyse qui est relié à chaque antenne (A, B, C, ... N) par une ligne de liaison (a, b, c, ..n) dans laquelle est placé un interrupteur ;
    un circuit multiplexeur intégré dans le dispositif d'analyse ou associé au récepteur qui active ces interrupteurs dans le procédé de multiplexage par répartition dans le temps ;
    caractérisé en ce que
    par l'analyse des intensités de champs saisies par le récepteur, il s'effectue une sélection de l'antenne avec la plus forte intensité de champ, le circuit multiplex
    transposant à l'état passant un seul ou uniquement deux interrupteurs l'un après l'autre pendant la transmission d'un signal de synchronisation d'un radiotélégramme, jusqu'à ce que l'antenne avec le signal HF le plus fort soit déterminée ; et
    transposant plusieurs interrupteurs ou tous les interrupteurs à l'état passant pendant la réception du signal utile de ce radiotélégramme pour obtenir une réception multiple de ce signal utile par plusieurs antennes (A, B, C ... N), et
    en ce que le dispositif d'analyse associe à l'aide de cette antenne sélectionnée le
    radiotélégramme à une roue définie qui se trouve à proximité de l'antenne sélectionnée.
  3. Récepteur multiple pour un dispositif de surveillance de pression de pneu selon la revendication 1, caractérisé par :
    une antenne de réception (A, B, C, .. N) par roue qui est fixée solidairement au véhicule à proximité de la roue considérée et qui est prévue pour la réception de radiotélégrammes HF qui sont émis par un dispositif émetteur sur la roue ;
    un dispositif central fixé solidaire au véhicule pour l'analyse des radiotélégrammes pour fournir au conducteur du véhicule des informations sur l'état des différents bandages pneumatiques;
    un récepteur intégré ou relié au dispositif central d'analyse qui est relié à chaque antenne (A, B, C,... N) par une ligne de liaison (a, b, c, ..n) dans laquelle est placé un interrupteur ;
    un circuit multiplexeur intégré dans le dispositif d'analyse ou associé au récepteur et activant ces interrupteurs dans le procédé de multiplexage par répartition dans le temps, circuit qui
    transpose plusieurs ou tous les interrupteurs à l'état passant avant l'arrivée d'un radiotélégramme ;
    transpose un interrupteur à l'état de verrouillage après l'arrivée d'un radiotélégramme et pendant l'analyse du signal de synchronisation en continu jusqu'à ce que l'antenne avec la plus grande intensité de champ soit déterminée ; et
    transpose ensuite pendant la réception du signal utile de ce radiotélégramme plusieurs interrupteurs ou tous les interrupteurs à l'état passant pour obtenir ainsi une réception multiple de ce signal utile par plusieurs antennes (A, B, C, ... N).
  4. Récepteur multiple pour un dispositif de surveillance de pression de pneu selon la revendication 1, caractérisé par :
    une antenne de réception (A, B, C, .. N) par roue qui est fixée solidairement au véhicule à proximité de la roue considérée et qui est prévue pour la réception de radiotélégrammes HF qui sont émis par un dispositif émetteur sur la roue ;
    un dispositif central fixé solidaire au véhicule pour l'analyse des radiotélégrammes pour fournir au conducteur du véhicule des informations sur l'état des différents bandages pneumatiques ;
    un récepteur intégré ou relié au dispositif central d'analyse qui est relié à chaque antenne (A, B, C, ... N) par une ligne de liaison (a, b, c, ..n) dans laquelle est placé un interrupteur ;
    un circuit multiplexeur intégré dans le dispositif d'analyse ou associé au récepteur et activant ces interrupteurs dans le procédé de multiplexage par répartition dans le temps, circuit qui
    transpose à l'état passant un seul ou uniquement deux interrupteurs l'un après l'autre pendant la transmission d'un signal de synchronisation d'un radiotélégramme, jusqu'à ce que l'antenne avec le signal HF le plus fort soit déterminée ; et
    transpose plusieurs interrupteurs ou tous les interrupteurs à l'état passant pendant la réception du signal utile de ce radiotélégramme pour obtenir une réception multiple de ce signal utile par plusieurs antennes (A, B, C ... N).
  5. Dispositif selon l'une des revendications 1 à 4,
    caractérisé en ce que
    le radiotélégramme est un signal HF, qui est modulé avec un signal numérique qui présente au moins un signal de synchronisation et au moins un signal utile et qui est doté au choix en supplément d'une identification et/ou un chiffre de contrôle ; en ce que les antennes de réception (A, B,, C,... N) et le récepteur sont prévus pour la réception de tels signaux HF, et le dispositif d'analyse est prévu pour l'analyse de tels signaux numériques.
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que le signal de synchronisation comporte 8 à 16 bits.
  7. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que chaque interrupteur est conçu comme une diode.
  8. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que chaque interrupteur est conçu comme un transistor.
  9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que chaque ligne de liaison (a, b, c, ... n) est placée après l'interrupteur sur un point cumulatif commun (S).
  10. Dispositif selon la revendication 9, caractérisé en ce que les intensités de champ formées au point cumulatif s'appliquent sur le récepteur et en ce que les intensités de champ se trouvant sur le récepteur sont converties en un signal numérique d'intensité de champ à l'aide du convertisseur analogique/numérique.
  11. Dispositif selon la revendication 9 ou 10, caractérisé en ce que le dispositif d'analyse présente en plus du point cumulatif (S), du récepteur et du circuit multiplexeur, un microprocesseur et en ce qu'à l'aide de ces composants, les fonctions suivantes sont exécutées :
    chaque antenne (A, B, C, ... N) est balayée les unes après les autres selon l'intensité de champ en présence ;
    si une intensité de champ notable est enregistrée, cette antenne (env. A) est sélectionnée ;
    en synchronisation avec chaque bit de données, l'une des antennes restantes (B, C, ... N)est intégrée ou exclue ;
    au point cumulatif (S) la puissance HF simultanée de deux antennes (env. A + B) est cumulée ;
    par comparaison des champs d'intensité ("A" avec ("A + B"), il est constaté sur quelle antenne (A ou B) se trouve la plus forte intensité de champ ;
    pour la période de bits suivante, l'antenne la plus forte (A ou B) reste sélectionnée ;
    ces étapes sont répétées pour les autres antennes (C, ... N) pour sélectionner l'antenne où se trouve la plus forte intensité de champ.
  12. Dispositif selon l'une des revendications 3 à 11, caractérisé en ce que quatre antennes de réception (A, B, C,... N) sont prévues ; et chacune de ces antennes de réception est associée à une roue active d'un véhicule particulier.
EP96114843A 1995-09-18 1996-09-16 Dispositif de surveillance de pneumatiques et récepteur à plusieures voies Expired - Lifetime EP0763437B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19534616 1995-09-18
DE19534616A DE19534616B4 (de) 1995-09-18 1995-09-18 Reifendruck-Überwachungseinrichtung

Publications (2)

Publication Number Publication Date
EP0763437A1 EP0763437A1 (fr) 1997-03-19
EP0763437B1 true EP0763437B1 (fr) 2001-07-11

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Country Status (6)

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US (1) US6112585A (fr)
EP (1) EP0763437B1 (fr)
AT (1) ATE202978T1 (fr)
CA (1) CA2185771A1 (fr)
DE (2) DE19534616B4 (fr)
ES (1) ES2161318T3 (fr)

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DE10240159B3 (de) * 2002-08-30 2004-07-15 Nolex Ag Reifenluftdruck-Kontrollvorrichtung
DE10316074A1 (de) * 2003-04-08 2004-10-28 Nolex Ag Reifenluftdruck-Kontrollvorrichtung
DE102004001250A1 (de) * 2004-01-07 2005-08-04 Siemens Ag Vorrichtung und Verfahren zur Ermittlung der Seitenposition von Rädern
DE102004018827A1 (de) * 2004-04-19 2005-11-10 Siemens Ag Vorrichtung Verfahren zur Ermittlung der Radposition von Rädern eines Radfahrzeuges
DE102004024388A1 (de) * 2004-05-17 2005-12-22 Siemens Ag Vorrichtung und Verfahren zum Bestimmen einer Radposition
DE102004032698A1 (de) * 2004-07-06 2006-02-16 Siemens Ag Vorrichtung und Verfahren zum Bestimmen einer Radposition
DE102004034287A1 (de) * 2004-07-15 2006-02-23 Siemens Ag Verfahren zur Lokalisierung wenigstens eines Rades eines Fahrzeuges
DE102004042191B3 (de) * 2004-08-31 2006-02-23 Siemens Ag Verfahren zur Lokalisierung wenigstens eines Rades eines Fahrzeuges
DE102004040790A1 (de) * 2004-08-23 2006-03-16 Global Dynamix Ag Vorrichtung und Verfahren zur Reifenluftdruckkontrolle
DE10341785B4 (de) * 2003-09-10 2006-04-27 Global Dynamix Ag Verfahren zur Zuordnung eines Radmoduls zu seiner Radposition und dafür geeignete Reifenluftdruck-Kontrollvorrichtung

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DE10240159B3 (de) * 2002-08-30 2004-07-15 Nolex Ag Reifenluftdruck-Kontrollvorrichtung
DE10316074A1 (de) * 2003-04-08 2004-10-28 Nolex Ag Reifenluftdruck-Kontrollvorrichtung
DE10316074B4 (de) * 2003-04-08 2006-01-26 Global Dynamix Ag Reifenluftdruck-Kontrollvorrichtung
DE10341785B4 (de) * 2003-09-10 2006-04-27 Global Dynamix Ag Verfahren zur Zuordnung eines Radmoduls zu seiner Radposition und dafür geeignete Reifenluftdruck-Kontrollvorrichtung
DE102004001250A1 (de) * 2004-01-07 2005-08-04 Siemens Ag Vorrichtung und Verfahren zur Ermittlung der Seitenposition von Rädern
US7146853B2 (en) 2004-01-07 2006-12-12 Siemens Aktiengesellschaft Device and method for determining the side position of wheels and motor vehicle having the device
DE102004001250B4 (de) * 2004-01-07 2005-11-24 Siemens Ag Vorrichtung und Verfahren zur Ermittlung der Seitenposition von Rädern
DE102004018827B4 (de) * 2004-04-19 2006-06-29 Siemens Ag Vorrichtung und Verfahren zur Ermittlung der Radposition von Rädern eines Radfahrzeuges
DE102004018827A1 (de) * 2004-04-19 2005-11-10 Siemens Ag Vorrichtung Verfahren zur Ermittlung der Radposition von Rädern eines Radfahrzeuges
US7222046B2 (en) 2004-04-19 2007-05-22 Siemens Aktiengesellschaft Device and method for ascertaining the wheel position of wheels on a wheeled vehicle
DE102004024388A1 (de) * 2004-05-17 2005-12-22 Siemens Ag Vorrichtung und Verfahren zum Bestimmen einer Radposition
DE102004024388B4 (de) * 2004-05-17 2006-07-06 Siemens Ag Vorrichtung und Verfahren zum Bestimmen einer Radposition
DE102004032698A1 (de) * 2004-07-06 2006-02-16 Siemens Ag Vorrichtung und Verfahren zum Bestimmen einer Radposition
US7271711B2 (en) 2004-07-06 2007-09-18 Siemens Ag Device and method for determining a wheel position
DE102004034287A1 (de) * 2004-07-15 2006-02-23 Siemens Ag Verfahren zur Lokalisierung wenigstens eines Rades eines Fahrzeuges
DE102004040790A1 (de) * 2004-08-23 2006-03-16 Global Dynamix Ag Vorrichtung und Verfahren zur Reifenluftdruckkontrolle
DE102004042191B3 (de) * 2004-08-31 2006-02-23 Siemens Ag Verfahren zur Lokalisierung wenigstens eines Rades eines Fahrzeuges

Also Published As

Publication number Publication date
CA2185771A1 (fr) 1997-03-19
DE19534616A1 (de) 1997-03-20
ES2161318T3 (es) 2001-12-01
EP0763437A1 (fr) 1997-03-19
ATE202978T1 (de) 2001-07-15
DE19534616B4 (de) 2007-01-11
US6112585A (en) 2000-09-05
DE59607259D1 (de) 2001-08-16

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